C11112331312111112111133133313331323132313232233133313113313112131211   >>    C1111233131211111211113313331333132313231323223313331311331311213121   <<    C11112331312111112111133133313331323132313232233133313113313112131213   >>      C11112331312111112111133133313331323132313232233133313113313112131212   >>